Scattered throughout Chicago are more than 30 woolly fabric as "crochet graffiti" by an underground artist group Micro-Fiber Militia.

So here's the obvious question: is crocheted art a form of vandalism?

Unlike spray-painted graffiti, which is more permanent and can be considered destructive to property, Kristin argues that her pieces don’t actively destroying anything and are more fleeting. She prefers the term “artistic littering.”

“I’m sewing it on,” she said, acknowledging that her work can be destroyed by a quick snip of the scissors. “It’s not buttons or Velcro that people can’t take off easily.”

The Chicago Police Department tends to agree. “Since there is no criminal defacement to property, it would be difficult to categorize it as vandalism,” said Monique Bonds, a department spokeswoman.